Machine for pointing pins



M. VIDAVER.

MACHINE FOR POINTING PINS.

APPLICATION FILED FEB. 24, 1919.

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MACHINE FOR POINTING PINS.

APPLicATIoN FILED FEB. 24v, 1919.

1,362,763, Patented Dec. 21,1920.

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' MACHINE FOR POINTING PINS.

APPLICATION FILED FEB. 24, 19|79.

1,362,763, Patented'ne. 21,1920.

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A ,4 TTRIVEY UNITED STATES PATENT OFFICE.

MAXWELL VIDA'V'ER, OF 'NEW YORK, N. Y.

MAcHrNE royal roIN'rrNe PINS.

Application led February 24, 1919. Serial No. 278,893.

To all whom t 'may concern:

Be it known that I, MAXWELL VIDAVER, a citizen of the United States, and a resident of the city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Machines for Pointing Pins, of which the following is a specification.

The present invention relates to improvements in machines for forming the points of pins.

The main object of the invention is to provide a machine of this character that is simple in construction and comparatively inexpensive, and whereby the pins may be pointed in an easy and economical manner without excessive or extraordinary expenditure of time and labor and without requiring the exercise of any special skill on the part ofthe attendants or operators such as is requisite where manual labor is employed in the manufacture of such articles.

With these and other objects in view, which will more fully appear' as the nature of the invention is better understood, the

same consists in the combination., arrangement and construction of parts hereinafter described, pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several parts and details of construction within the `scope of the appended claims without departing from the spirit or sacricing any of the advantages of the invention.

One of the many possible embodiments of the invention is illustrated in the accompanying drawings, in which Figure 1 is a plan view of a pin pointing machine constructed in accordance with the present invention; Fig. 2 is a section taken on line 2 2 of Fig. 1; Fig. 3 is a section taken on line 3 3 of Fig. 2; Fig. -1 is a perspective view of a portion of the pin-carrier of the machine; and Fig. 5 is a perspective view of a detail of construction.

In the drawings, the numeral 1() indicates the frame of the machine, provided inV its sides 11 and 12 with bearings 13 and 14, respectively. In these bearings, which are in alinement, are rotatably mounted horizontally extending shafts 15 and 16, respectively,'having a common longitudinal axis.

The inner ends of these shafts are juXtav posed, meeting substantially in the center of the frame, and are provided with means to keep them in proper alinement. For this purpose, for instance, the inner end of the shaft 16 is reduced in diameter, as clearly `shown at 17, said reduced end extending into a cylindrical recess 18 inthe shaft 15. Continuous rotation may be imparted to these two shafts in any suitable manner, for instance bychains 19 and 20, running over sprocket wheels 2l and 22, respectively, the sprocket wheel 21 being fixed to the shaft 15 and the sprocket wheel 22 to the shaft 16.

Upon the shaft 15 turns loosely a pincarrier 23, in the form of a disk, that is provided with radially extending, equidistantly disposed notches 24 in its peripheral portion, the length of each notch being several times the diameter of a pin,'and the width of each slot being slightly larger than the diameter of a pin. This pin-carrier is rotated from the shaft 15, to which is fixed for this purpose a pinion 25, in mesh with a gear -26, the latter being attached to a counter shaft 27, that is rotatably journaled in bearings 28 on the sides of the machine frame. The ratio of the pinion 25 and gear 26 is 1:2,for a purpose hereinafter to be described, To the counter shaft 2T is fixed a gear 29, in mesh with a gear 30, that is secured to the pin-carrier A3. The ratio of the gears'29 and 30 is 1:1.

`With theV pin-carrier cooperate two pinsupports, denoted'by the numerals 31 and 32. These supports are made in the form of disks of Vequal diametenvone support being disposed upon each side of the carrier. The diameter of the pin-supports is substantially smaller than that of the pin-carrier, se that the pins within the notches 241 rest on "the peripheral portions of the said supports. Both supports are )fixed to the shaft 15 and rotate thus at a speed twice that of the pin-carrier. To the support 32 is adjustably secured, in the form of a fiange, a stop 33, to gage the positions in which the pins are presented to a grind- 'ing wheel 35, which is fixed to the shaft 16. The peripheral portion of this grinding wheel is of proper bevel, to produce the desired amount of pointing of the pins. The

grinding wheel is disposed at a slight distance from the pin-support 31, the ends to be pointed of the pins projecting beyond the last-mentioned ypin-support onto the bevel surface of the grinding wheel, which is disposed concentrically with the two pinsupports and the pin-carrier.

Around the upper part of the perimeter of each pin-support extends 'an arc-'shaped spring band or strip 36. These bands are fixed to a support 37,that extends transversely of and is secured to the frame 10. The spring bands or strips are forced against the perimeter of the pin-supports by helical springs 38, bearing againstthe said bands and the frame 37. Vith each spring band cooperates a plurality of these helical springs, the latter being suitably spaced apart, as clearly appears from Fig. 3 of the drawings, and thereby dividing the respective spring band into a plurality of independently operating sections, as will hereinafter appear. The frame 37 is adjustably secured to the main frame 10, and the spring band coperating with the support 32 is adjustably mounted upon the frame 37, to permit of adjustment according to the size of the pins to be operated upon.

The pins to be pointed are fed by gravity into the notches 24 in the pin-carrier 23 from a chute 39having an inclined bottom 40. This chute is supported by a standard 41, rising from the base plate 42, to which the frame l0 is attached. The side wall 43 of the chute is adjustably secured in relation to the opposite side wall thereof to accommodate pins of different sizes.. In order to prevent more than one pin from entering a notch 24 in the pin carrier, there rise from the bottom 40 of the chute lugs 44, in alinementvwith the pin-supports 3l and 32.` These lugs extend upward to the spring bands or strips 36 and are disposed from the periphery of the pin-carrier a distance that is slightly larger than thediameter of a pin.

The finished product falls into a chute 45,

it being removed from the pin-carrier by a stripper 46, that projects from a standard 47 to points adjacent the peripher f of the pinsupports 31 and 32.

The operation of the machine is as follows The pin blanks are placed into the chute 39, wherein they slide,'one after other, into the notches in the carrier 23, as the same rotate past the discharge opening in said chute. The inner ends of these notches are disposed inside the perimeter of the pinsupports, so that the pins may properly rest on the pin-supports. As above-mentioned, the lugs 44 permit only a single blank to enter a notch. While the pin blanks are traveling in contact with the said lugs, they do not rest upon the pin-supports 3l and 32. As soon as the pin-blanks have passed the 'lugs 44, the spring bands or strips 36 force vthe same against the rotating pin-supports,

and since the latter rotate at twice the speed of that of the carrier, the said pin blanks are not only advanced in the direction of the arrow shown in Fig. 3 of the drawings, but also caused to rotate around their own axes. While the pin blanks are thus carried from the chute 39 to the strippers 46, their protruding ends, which are in contact with the rapidly rotating grindingr wheel 35, are gradually pointed, the finished product being disengaged from the carrier by the strippers 46, falling by gravity into the chute 45.

The spring bands or strips 36 are continuouslyV under the tension of the helical springs 38, the latter dividing the said bands into a plurality of independent portions, so that, if a thicker pin blank enters one of the notches ofthe carrier, it will not interfere with the proper operation of the device, for the reason that, as it travels along the said spring bands or strips, the latter are adapted to yield at any given point thereof, the springs 38 still forcing the said bands into contact with the remaining proper sized pin blanks on the carrier.y Y

The machine as herein set forth is especially well adapted for use in the manufacture of ordinary pins, but it is tobe understood that the invention is not limited lin its scope to its application to machines for the manufacture of pins, but may be, with equally good results, applied to machines for pointing cylindrical objects of any size, both as to length and diameter.

The invention presents many advantagesv and improved results in its practical use in the manufacture of pins permitting them to be produced in a continuous operation and aiutomatically, dispensing thus to a great eX- tent with the handling' of the product and various other manual operations which havey heretofore been` required in this. art and which have greatly increased the .cost of the finished article.

It is obvious that, instead of the particular driving mechanism herein described, others may just as well be used without departing from the invention, which lies mainly in the provision of a pin-carrier, in combination with pin-supports, that rotate in the direction of said carrier but at a considerably higher speed, at least twice the speed of said carrier, in combination with the means for preventing more than one pin blank from entering a. notch on said carrier, and the stripping means for disengaging the finished product from said carrier.

Vhat I claim is l. In a machine for pointing pins, the combination with a pair of rotatable diskshaped pin-blank supports, of a .rotatable disk-shaped carrier disposed between said supports and provided with transverse notches in its peripheral portion adapted to receivethe pin-blanks, said carrier being of a larger diameter than said supports, means for positively driving said carrier at a speed lower than that of said supports, and spring pressed means for forcing said blanks againstthe perimeter of said supports.

2. In combination with the machine defined by claim l, a chute for the blanks cooperating with said carrier, and means adjacent said chute permitting a single blank only to enter a notch in said carrier.

3. In combination with the machine defined by claim 1,'a stripping means for removing the finished product from said carrier.

fi. In a machine for pointing pins, the combination with a pair of rotatable diskshaped pin-blank supports, of a rotatable disk-shaped carrier disposed between said supports and provided with transverse notches in its peripheral portion adapted to receive the pin-blanks, said carrier being of a larger diameter than said supports, the

-inner ends of said notches being disposed inside the perimeters of said supports, means for rotating said supports at a speed higher than that of said carrier, and spring-pressed means for forcing said blanks against the perimeter of said supports.

5. In combination with the machine claimed in claim 1, a stop upon one of said supports for engaging one end of each blank while on said carrier, the other end of said blank projecting beyond the other support, and a rotary grinding wheel adjacent said last-mentioned support and in concentric relation thereto.

6. In a machine for pointing pins, the' combination with a pair of rotatable diskshaped pin-blank supports, of. a rotatable disk-shaped carrier disposed between said supports and provided with transverse while on said carrier, the other end of said blank projecting beyond the other support, andr a rotary grinding wheel adjacent said last-mentioned support and in concentric relation thereto.

7. In a machine for pointing pins, the combination with a pair of rotatable diskshaped pin-blank supports, of a rotatable disk-shaped carrier disposed between said supports and provided with transverse notches in its peripheral portion adapted to receive the pin-blanks, said carrier being of a larger diameter than said supports, means for positively driving said carrier at a speed lower than that of said supports, spring-pressed means for blanks against the perimeter of said supports, a stripping means for removing the linished product from said carrier, a stop upon one of said supports for engaging one end of each blank while on said carrier, the other end of said blank projecting beyond the other support, and a rotary grinding wheel adjacent said last-mentioned support and in concentric relation thereto.

8. In combination with the machine claimed in claim 4, a stop upon one of said supports for engaging one end of each blank while on said carrier, the other end of said blank projecting beyond the other support, anda rotary grinding wheel adjacent said last-mentioned support and in concentric relation thereto.

9. In a machine for pointing pins, the combination with a pair of rotatable diskshaped pin-blank supports, of a rotatable disk-shaped carrier disposed between said supports and provided with transverse notches in its peripheral portion adapted to receive the pin-blanks, said carrier being of a larger diameter thanl said supports, means for positively driving said carrier at a speed lower than that of said supports, a spring band extending around part of the perimeter of each support,- and spaced springs acting upon said bands for forcing the blanks against the perimeters of said supports.

Signed at New York, in the county of New York and State'of New York, thisV 6th day of Febr., A. D. 1919. j

MAXWELL VIDAVER.

forcing said j 

